Drying-kiln



W/ TNESSES S. E. CORNISH.

DRYING KILN.

APPLICATION FILED IAN.20, 1920.

Patnted Apr, 26, 1921.

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S. E. CORNISH.

DRYING KILN.

V i APPLICATION FILED JAN. 20, 1920. 1,376,319' A Patented Ama 269 1921.

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ATTUHNEIS UNITED STATES Pa'riezia'rl OFFICE.

SIDNEY E. CORNISH, OF BERKELEY. CALIFORNIA, ASSIGNOR OF ON-HALF TO H. H.

i PLUMMER, OF SAN FRANCISCO, CALIFORNIA.

DRYING-KILN.

Application filed January 20, 1920.

To all iclioiiifi'imuy concern.'

Be it known that I, SIDNEY E. ConNisH, a citizen of the United States. and a resident of Berkeley. in the county of Alameda and State of and Improved Drying-Kiln, of which the following is a full, cleai, and exact description.

This invention relates to improvements in drying kilns, an object of the invention being to provide a kiln having` a transverse draft of heated air to di'y the material movable longitudinally through the kiln.

A 'further object is to provide a drying kiln having means for moving material longitudinally therein and means for compelling` a continuous circulation of air from the dry end of the kiln to the charging end of the kiln and' in such movement compel the air to pass crosswise or transversely through the kiln any desired number of times.

A further object is-to provide a kiln of improved construction having heating means therein with draft creating devices compelling the hot air to travel 1n a continuous path from the dry end to the charging end and in such nath of movement pass transversely and at an angle through the kiln the desired number of times.

IVith these and other objects in view the invention consists in certain novel features .of construction, and combinations and arrangements of parts, as will be more fully hereinafter described and pointed out in the claims.

In the accompanying drawings- Figure 1 is a broken view in side elevation illustrating my improvements;

Fig. 2 is a broken plan view;

Fig. 3 is an enlarged view in transverse section on the line 8 3 of Fig. 2;

Fig. 4 is a fragmentary perspective view illustrating a preferred manner of piling veneer foi' drying in the kiln'; and

Fig. 5 is an exaggerated v iew in section of a fragment of the kiln wall.

A represents my improved drying kiln Which is preferably made up in sections so that it can be formed of any desired length. The walls of the kiln are rendered non-heat conducting in 'any approved manner. a simple illustration of this, and which I deem a desirable construction, is shown in Fig. 5, in which` corrugated asbestos lining strips Specification of Letters Patent.

alifoinia. have invented a new- Serial No. 352,743.

1 are located between thicknesses 2 and serve' to form dead air spaces in the non-heat conducting walls. The invention, of course. is not limited to the particular manner of constructing the walls as this might be done in various ways.

A conveyer is provided in the kiln and comprises a pair of endless -chains 3 supported on suitable framework 4 and driven b v sprocket wheels 5 at one end of the kiln. The kiln is heated preferably by steam pipes 6 arranged between and at the sides of the chains 3 and may be of any desired length to gire the necessary results. A charging door 7 is provided at one end `of the kiln and a discharging door 8 at the other end of the kiln so that these doors may b'e closed during the drying operation. i

Fans 9 are provided at one side of the kiln spaced apart the desired distance and arranged in staggered relation to air outlets 9a at the other side of the kiln and are connected with said air outlets by means of tlues 10 extending transversely above the kiln and diagonally. as clearly indicated in Fig. 2. Thispairangement of fans and i'liies compels the air from the dry end of the kiln to pass to the charging end of the kiln in a circuitoiis path. as indicated by the arrows in Fig. 2. In other' words` the air is drawn hand flues and finally finds an'exit' through a ventilator head 11 adjacent the charging end of the kiln. Illliile. of course. my invention 'is not limited to the particular means for operating the conveyer and di'iv- .ing the fans, I have illustrated a power transmission means which can be coiivenieiitly employed.

A motor 12 drives a belt 13 which turns a pulley 141 on n countershaft 15. This countershaft 15. has 'two `pulleys 16 and 17 thereon, the former connected by a belt 18 with a pulley 19 on ashaft 20. The shaft 20 is provided with a gear train 21 which reduces the speed of sprocket wheels 22, the latter connected by chains 28 with sprocket wheels 24 on the shafts 25 carrying the sprocket wheels 5, above referred to. The pulley 17 is connected by a belt 26 with a pulley 27 on an intermediate fan shaft 28. This shaft 28 is provided with two other Patented Apr. 26, 1921.

pulleys 29 and 30, the former connected by a I belt 31 with a pulley 32 on another fan shaft be utilized for dryingl fruit or for any other purpose for which it is adapted, it is pri- 'marily adapted for drying veneer and I have illustrated in Fig. 4 a pile of veneer 35 spaced apart by blocks or strips 36 and adapted to be positioned on the conveyer chalns 3 and Imoved longitudinally of the kiln so that the transverse drafts of air will have a free passage through thepile of veneer and freely dr the same.

lhe veneer is preferably positioned with its grain running transversely ofthe kiln and in a substantial line with the draft. By constructinga kiln, as above described, the air from the dry end of the kiln is caused to move to the charging end of the kiln in a circuitous transverse path to takeup the moisture of the material being dried, and While, of course, the temperature of the air -is not materially decreased it becomes more and more charged wath moisture as 1t reaches the ventilator head-so that the incoming green material is no tense dry air which it receives as it reaches the dry end of the kiln and hence, the drying operation is carried out slowly and in the proper stages to give the best results.

The arrangement of fans is such that they,

cause a circulation nearly equal on all of the material or stock as the kiln is relatively narrow and as the blast is practically the same at both sides of the kiln. Hence, the stock will be dried uniformly as it passes through the kiln.

It is, of course, to be understood that the temperature of the kiln can be controlled in accordance with the Work to be done andthe draft of air regulated to precisely suit conditions. The kiln may be operated as a con'- tinuous drier through whichv the stock or material is passed or the stock may be allowed to remain in the kiln sired length of time.

through the kiln.

- subjected to the infor any de-' the precise details set forthv but consider myself at liberty to make such changes and valterations as fairlyffall within, the spirit and scope 'of the appended claims.

' claim:

1f. A kiln,v fans` at one side of the kiln, and fines connecting thefans with theother side of the kiln, whereby a continuous c ircuitous circulation of'air is provided transversely 2. A kiln, a plurality of fans located at one iside of the kiln, saidkiln having air outlets at its other side, diagonally positioned flues vconnecting the fansA on one side ofthe kiln `with the outlets on the otherside of the kiln,

and means for operating the fans to force the air transversely of the kiln and in an in` clined direction toward the charging end-of the kiln. .l

3, A kiln, comprising a lon itudinal series of sections, the walls of sai 1sections com-v posed of non-heat conducting material, a conveyer extending longitudinally of the kiln, steam pipes in thekiln, fans adapted to blow transversely ofthe kiln, and meansA for transmitting power tovsaid` fans and to said conveyer.' y

4. A kiln, fans at one .side of the kiln, and

I' flues connecting the fans with the other sides of the kiln whereby a continuous circuitous 5.v A kan, aus a me Side of t'he'kiin, and

circulation ofair. is provided transversely lues connecting the fans with the other sides f Aof the kiln whereby a continuous circuitous circulation of air 1s providedt-ransversely through the kiln, a conveyer in 'said kiln, and

means for simultaneously operating the fans` and the conveyer.

SIDNEY E. conNisH. 

